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<blockquote data-quote="helotaxi" data-source="post: 2440835" data-attributes="member: 550915">Car batteries have a capacitance value will allow for a significant discharge from the skin voltage.Under a large current load, a V drop of 1V front to rear in the car is pretty common even with 1/0 wiring.&nbsp; Add to that the fact that if your battery is only providing 11V under a load coming off a full charge, then it&#039;s shot.Your whole argument is based on a series of faulty assumptions, the most glaring of which is that resistance losses in the system are negligible.&nbsp; Not only are they significant but they obviously increase with the current load.&nbsp; With the car running and the system off, you will measure the alt voltage at the amp terminals all day, but turn on the system even at low volume and the voltage will drop measurably because of the increase in current.&nbsp; The basic premise that you are arguing against has been proven more than once by multiple different people.&nbsp; If you were right, then it would be a waste for the high level competitors to have banks of batteries, because they have 4&nbsp; huge alts and their cars are running during metering.&nbsp; According to your logic, their voltage should be stable without those batteries.Basically what it all comes down to is your premise that a second battery does nothing to help with voltage dips during dynamic music is not valid with most cars or most daily systems.&nbsp; Adding a battery can help and help a lot for most people.</blockquote>

[QUOTE="helotaxi, post: 2440835, member: 550915"] Car batteries have a capacitance value will allow for a significant discharge from the skin voltage.Under a large current load, a V drop of 1V front to rear in the car is pretty common even with 1/0 wiring. Add to that the fact that if your battery is only providing 11V under a load coming off a full charge, then it's shot.Your whole argument is based on a series of faulty assumptions, the most glaring of which is that resistance losses in the system are negligible. Not only are they significant but they obviously increase with the current load. With the car running and the system off, you will measure the alt voltage at the amp terminals all day, but turn on the system even at low volume and the voltage will drop measurably because of the increase in current. The basic premise that you are arguing against has been proven more than once by multiple different people. If you were right, then it would be a waste for the high level competitors to have banks of batteries, because they have 4 huge alts and their cars are running during metering. According to your logic, their voltage should be stable without those batteries. Basically what it all comes down to is your premise that a second battery does nothing to help with voltage dips during dynamic music is not valid with most cars or most daily systems. Adding a battery can help and help a lot for most people. [/QUOTE]

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